How to understand this sentence ?
"you'd be staring at the business end of a hissy fit."

I need to explain the meaning of the phrase "the business end of"in this sentence.
Thank you in advance.

Question

How to understand this sentence ?
"you'd be staring at the business end of a hissy fit."

I need to explain the meaning of the phrase "the business end of"in this sentence. 
Thank you in advance.

Answer

This is extremely colloquial English,  'business end' means strongest or most important parts of something. 
In this context, the sentence means, 'you would have to anticipate a huge tantrum'.